
"Titanium-Based Molecules Enhance Carbon Capture Efficiency in Breakthrough Study"
In a significant advancement for climate change mitigation, researchers at Oregon State University have synthesized new titanium-based molecules that effectively capture carbon dioxide from the atmosphere. This breakthrough paves the way for more affordable and efficient direct air capture (DAC) technologies.
The study, led by May Nyman and Karlie Bach from OSU’s College of Science, focuses on titanium peroxides, a promising alternative to previous research using vanadium peroxides. Published in Chemistry of Materials on December 12, this research is part of a larger federal initiative aimed at developing new methods for capturing CO2 from the air — a critical step in reducing the impact of fossil fuel emissions.
Advancing Direct Air Capture Technology
The research builds on Nyman’s role in a 2021 Department of Energy project, where she and her team were selected to lead one of nine DAC-focused initiatives funded by a $24 million investment. Their work investigates how certain transition metal compounds, like titanium, can react with air to capture CO2 and convert it into stable carbonates, akin to natural minerals.
While direct air capture technology is still in its early stages, the need for such systems is becoming more urgent. Existing technologies that capture CO2 at its emission source, such as at power plants, are more advanced, but a combination of both direct air capture and point-of-entry solutions is seen as essential to addressing climate change.
Cost-effective and Efficient Carbon Capture Solutions
In their exploration of titanium as a material for DAC, the research team discovered that titanium is far cheaper, more abundant, and environmentally friendly compared to vanadium, which has been used in previous studies. Titanium’s position next to vanadium on the periodic table led the researchers to hypothesize that it could offer similar carbon capture capabilities at a much lower cost.
The researchers synthesized several new tetraperoxo titanate structures, molecules with four peroxide groups bonded to a titanium atom. These compounds proved highly reactive, with one of their best-performing compounds, potassium tetraperoxo titanate, capturing approximately 8.5 millimoles of CO2 per gram—twice the carbon capture capacity of vanadium peroxide.
This breakthrough demonstrates that titanium’s cost-effectiveness and efficiency could provide a powerful tool in the fight against climate change, making carbon capture more accessible and scalable.
A Sustainable Future with Titanium
Titanium, known for its strength and light weight, is already widely used in various industries and is non-toxic and resistant to corrosion. As the ninth most abundant element in Earth’s crust, titanium is a more sustainable and safer alternative for large-scale carbon capture, promising a future of cleaner, more efficient solutions to reducing CO2 levels.